Technological and physical properties of dry pressed red mud bodies containing chamotte


ARABIAN JOURNAL OF GEOSCIENCES, vol.12, no.9, 2019 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 12 Issue: 9
  • Publication Date: 2019
  • Doi Number: 10.1007/s12517-019-4430-0


Each clay has its own distinct makeup, resulting in a different handling quality, color, temperature range and plasticity, or workability. The choice of clays is wide and you can also combine them which will increase the possibilities further. In this study, dry pressed red mud bodies containing chamotte were used for increasing mechanical properties. Five, 10, and 15wt% chamottes were added to red mud bodies, separately. Prepared granules were dry pressed with suitable pressing pressure. Dry pressed granules were sintered at 900, 950, and 1000 degrees C for 2h. Physical and technological properties were determined by measuring pore diameter, density, shrinkage, and water absorption. Structural characterization was carried out with XRD and scanning electron microscopy (SEM) studies. Vickers microhardness and bending strength test were done to determine mechanical properties. Optimum chamotte addition to red mud bodies and optimum sintering temperature with high mechanical properties were determined with this study. The best density, water absorption, firing shrinkage and bending strength values were obtained with RM15C sample sintered at 1000 degrees C as 2.94g/cm(3), 6.6%, 10.9%, and 107MPa, respectively.